Investors & landlords

Here is a second alternative.

The error message you are seeing on the wash sale entries is a result of automatic rounding.  If the wash sale adjustment is $0.49 or less, then it is automatically rounded to zero.  This type of rounding is allowed by the IRS. 

To enter a disallowed Wash sale:​​​​​​​

Income & Expenses

1. Scroll to Stocks, Mutual Funds, Bonds, Other
2. Answer Yes to Did you sell stocks, mutual funds, bonds, or other investments in 2020?
3. On the OK, what type of investments did you sell? screen, select Stock, Bonds, Mutual Funds. Then select Continue.
4. From here, you can import or manually enter your 1099-B.
5. Answer the questions about your sales. Choose to Enter sales one by one when asked.
6. On the Now, we'll enter one sale on your 1099-B screen, enter your info.
7. Check I have other boxes on my 1099-B to enter and enter the disallowed wash sale loss in box 1g.
8. Select Continue and answer any follow-up questions.

Note: You'll need TurboTax Premier, TurboTax Live Premier, or TurboTax Self-Employed, TurboTax Live Self-Employed, to add any 1099-B forms.

When you sell an investment that has lost money in a taxable account, you can get a tax benefit. The wash-sale rule keeps investors from selling at a loss, buying the same (or "substantially identical") investment back within a 31-day window, and claiming the tax benefit.

If you sell a stock at a loss and purchase it back within 31 days it will create a wash sale.  That loss then carries over to the new purchase and is added to the cost basis of the newly purchased stock.  

Your broker should keep track of this, and it should be reflected in the future cast basis for profit/loss purposes